title: Effect of overweight on P-wave and QT dispersions in childhood.
abstract: OBJECTIVE
  The effects of obesity on atrial conduction and ventricular repolarization have been studied in detail, but these parameters have not been well documented in overweight children. The aim of our study was to investigate the effects of overweight on atrial conduction and ventricular repolarization in children by using P-wave dispersion (Pw-d) and QT dispersion (QT-d) analyses.
  
  
  METHODS
  Sixty-seven overweight children and 70 children within normal limits were included in this cross-sectional prospective controlled study. All subjects underwent electrocardiographic and anthropometric evaluation, and blood samples were obtained. Pw-d and QT-d were investigated between two groups.
  
  
  RESULTS
  Homeostatic model assessment of insulin resistance levels were higher in the overweight group (2.9±1.2 vs. 1.1±0.8, p=0.001). No statistically significant differences were found in Pw-d and QT-d when the groups were compared. The following findings were recorded for the overweight and control groups, respectively: mean RR interval (635±42 msec vs. 645±45 msec, p=0.867), Pw-d [30 (10-55) msec vs. 27.5 (15-50) msec, p=0.441] and QT-d (30 (15-55) msec vs. 22.5 (10-60) msec, p=0.476). In addition, Pw-d and QT-d were not correlated with the levels of insulin or body mass index.
  
  
  CONCLUSIONS
  There was no significant difference in atrial conduction or ventricular repolarization features between overweight children and normal-weight children.
authors.affiliation: Department of Cardiology, Namık Kemal University Faculty of Medicine, Tekirdağ, Turkey. ayakyuzq5@gmail.com.
authors.forename: Aydın
authors.initials: A
authors.lastname: Akyüz
authors.forename: Seref
authors.initials: S
authors.lastname: Alpsoy
authors.forename: Dursun Cayan
authors.initials: DC
authors.lastname: Akkoyun
authors.forename: Burçin
authors.initials: B
authors.lastname: Nalbantoğlu
authors.forename: Feti
authors.initials: F
authors.lastname: Tülübaş
authors.forename: Erkut
authors.initials: E
authors.lastname: Karasu
authors.forename: Mustafa Metin
authors.initials: MM
authors.lastname: Donma
mesh_terms: D001786:Blood Glucose / Q000378:metabolism; D015992:Body Mass Index; D002648:Child; D003430:Cross-Sectional Studies; D004562:Electrocardiography; D005260:Female; D006439:Hemodynamics / Q000502:physiology; D006801:Humans; D007328:Insulin / Q000097:blood; D008297:Male; D050177:Overweight / Q000097:blood / Q000503:physiopathology*
chemical_list: D001786:Blood Glucose; D007328:Insulin